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MS51971-1
Military Standard Plain Hexagon Nut
Description
MS 51971-1 Plain Hexagon Nut - Finished Pattern
Specifications
| Bearing Surface Type | Chamfered or washer faced |
|---|---|
| Hexagon Size - Across Flats | 7/16 |
| Hexagon Size - Thick | 7/32 |
| Iii End Application | Mrap- cougar ambulance/rg-33 auv; mrap buffalo mk2a2; mrap - cougar tow; mrap - cougar sabr/tow |
| Material | CRES |
| Material Specification | Aisi 304 or sae 30304 federal standard 2nd material response or aisi 14140c federal standard 3rd material response aisi 303 or sae 30303 federal standard 1st material response or federal standard 66 fed standard 66 |
| Nut Height | Between 0.212 inches and 0.226 inches |
| Nut Style | Hexagon |
| Size | 1/4-20 |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 federal specification single treatment response |
| Thread Class | 2b |
| Thread Direction | Right-hand |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series | Unc (coarse thread) |
| Thread Size | 0.250 |
| Weight | .005 lb |
| Width Across Flats | Between 0.4280 inches and 0.4375 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- 12387305-3 Commercial 1/4-20 · Steel
- MS51967-2 MS 1/4-20 · Steel
- MS51967-3 MS 1/4-20 · Steel
- MS51969-1 MS 1/4-20 · Brass
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Catalog data updated 2026-07-05. Report a data error